Rigoberto very well, I don't know how you are testing those sensors, but I share my experience, since here in my town I was making arrangements to those bars, to begin with it has two modules, one above and one below, here the most common thing that happens is that people climb with bags or umbrellas or packages and unintentionally get to cover the top sensor but when they raise one foot they cover the bottom one as a result of covering the two marks them a passage, and of course the drivers realize until they are counted in the base.